Nov 4 2025 – The Election Commission launches Phase II of the Special Intensive Revision (SIR) across 12 states and union territories, including Tamil Nadu, marking the start of house‑to‑house enumeration and form distribution [9].

Dec 8 2025 – The Commission appoints five senior IAS officers and a retired IAS as Special Roll Observers to monitor West Bengal’s SIR, tightening oversight of deletions and hearings [30].

Dec 10 2025 – West Bengal reports over 57.5 lakh uncollectable enumeration forms, including more than 24 lakh dead voters, prompting Chief Electoral Officer Manoj Kumar Agarwal to order “thorough scrutiny of entries” before the draft roll release [30].

Dec 16 2025 – Draft electoral rolls go live for West Bengal, Rajasthan, Goa, Puducherry and Lakshadweep; West Bengal’s draft shows 58 lakh deletions, reducing the electorate to about 7.08 crore [26][27].

Dec 19 2025 – Tamil Nadu publishes its integrated draft roll after SIR, listing 5.43 crore voters after 97.37 lakh deletions; Chief Electoral Officer Archana Patnaik notes the roll now has 2,66,63,233 men, 2,77,06,332 women and 7,191 third‑gender voters [21]; Congress MP B. Manickam Tagore protests that “two voters’ names appear in Hindi” and claims the deletions serve a “RSS and BJP agenda” [19]; the state’s SIR report questions the CEO’s claim of “100 % form coverage” [16].

Dec 20 2025 – An analysis shows more than half of Tamil Nadu’s deletions concentrate in eight districts of the Chennai and Tiruppur clusters, with economist V. Athreya attributing the pattern to “migrant workers and industrial activity” [20].

Dec 23 2025 – Kerala releases its SIR draft rolls, covering 2.69 crore voters; the Chief Electoral Officer Rathan U. Kelkar announces the final roll will be published on Feb 21 2026 [18]; Gujarat’s draft roll reveals 73.73 lakh deletions, dropping the electorate to 4.34 crore [25].

Dec 27 2025 – The Election Commission publishes draft rolls for all states and UTs except Uttar Pradesh, completing the second‑phase SIR rollout [9]; Tamil Nadu records 4,42,070 Form 6/6A applications between Dec 19‑27, with 2.56 lakh filed on Dec 27 alone, and schedules special camps on Jan 3‑4 2026 [12].

Dec 28 2025 – Uttar Pradesh’s draft roll deletes 2.89 crore names (≈ 18.7 % of the pre‑SIR list); a month‑long objections window opens on Jan 1 2026 for affected voters to file Form 6 [11]; Assam’s draft roll removes 10.56 lakh voters, with the final roll slated for Feb 10 2026, while the Supreme Court takes suo motu cognisance of the Aravalli definition issue [13][14].

Dec 31 2025 – The Hindu editorial labels the nationwide SIR “a farce,” citing “ad‑hoc changes, rushed hearings and software patches” that jeopardise universal adult franchise [10].

Jan 3 2026 – West Bengal’s SIR cuts logical discrepancies to 94.49 lakh, down from 1.67 crore in the December draft, as officials resolve progeny‑mapping errors [8].

Jan 4 2026 – Kerala’s SIR draft excludes 24.08 lakh voters and flags 19.32 lakh “No‑mapping” cases; the CEO assures that “all eligible voters will be included in the final roll to be published on Feb 21” [7].

Jan 6 2026 – Uttar Pradesh publishes its draft roll with 2.89 crore deletions, caps voters per booth at 1,200, creates 15,030 new polling stations, and opens a month‑long claims‑and‑objections period [6].

Jan 9 2026 – West Bengal’s first SIR phase deletes about 58 lakh voters, sparking political tension; Chief Minister Mamata Banerjee writes to the Election Commission demanding fixes, while the EC exempts overseas and temporarily away voters from in‑person hearings [5].

Feb 14 2026 – The Election Commission schedules final roll publication for the four regions that completed SIR (Kerala, Madhya Pradesh, Chhattisgarh, Andaman & Nicobar) [17].

Feb 17 2026 – Gujarat releases its final electoral roll after SIR, confirming the earlier‑reported 73.73 lakh deletions [3].

Feb 21 2026 – The Supreme Court orders SIR cases in West Bengal to be shifted to other courts for a “week‑to‑10‑day” period, citing a “trust deficit” between the state government and the Election Commission [3]; Kerala’s final roll goes live, listing 2,69,53,644 voters [4].

Feb 23 2026 – The Election Commission publishes Tamil Nadu’s final voter list, registering 5,67,07,380 electors (including 12.51 lakh aged 18‑19 and 3.99 lakh senior citizens), with Sholinganallur topping constituency counts [1][2].